Been there and done that exact trip several times. How much time do you have? Are you interested in taking any detours off of the Parkway to catch some great twisties or do you just want some info on what to see along the BRP? Do you have places to stay already reserved or are you camping? Be prepared for the weather, this time of year it's not unusual to have daytime temps in the 40's in the highest elevations and 50's and low 60's most everywhere else. I have ton's of info I can offer if you are interested. Let me know.
John